Sidewalks and streets are both made of concrete, what’s the difference that makes running on streets better? Or is that a myth?
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Im assuming by your explanation that asphalt isnt used for your streets.
This theory comes from sidewalks being concrete (rock and glue essentially) and roads being made of asphalt (tar and gravel). Tar is more springy compared to dried glue so it absorbs more impact from your stride instead of returning the full energy straight back into your legs.
VERY ROUGH comparison: Think bumper car versus brick wall. If you collide in a bumper car, youre not likely to suffer injury. If you run headfirst into a brick wall, youre definitely going to suffer injury.
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